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Registration Number

0214U001978, 0114U002924 , R & D reports

Title

Investigation of double beta decay of 106Cd and 100Mo

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Head

Danevich Feodor,

Registration Date

16-12-2014

Organization

Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine

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Double beta decay of 100Mo to the excited level of 100Ru was studied. The half life of the two-neutrino double decay on the first level 0+1 in 100Ru is measured to be T1/2 = [7.5±0.6(stat.)±0.6(syst.)] * 1020 years. For two-neutrino and neutrinoless transitions to the 2+1, 2+2, 0+2, 2+3 and 0+3 levels in 100Ru, limits are obtained at the level of T1/2 > (0.25-1.1) * 1022. Obtained new limits on the half-life 100Mo relative to neutrinoless 2 -decay T1/2 > 1.1 * 1024 (with confidence level 90%), which follows the limits on the neutrino mass (depending on the theoretically calculated values of nuclear matrix elements) m < 0.3 - 0.9 eV. Obtained new limits on other (except for neutrino masses) mechanisms neutrinoless 2 -decay that violate lepton number. Established new limits on the process of double beta decay in the nucleus 106Cd (including the process of neutrinoless double electron resonance capture of three excited levels 106Pd) on the sensitivity level of T1/2 > 1019 - 1021 years.

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Бойко Роман Сергійович
Даневич Федір Анатолійович
Зуєва Олена Володимирівна
Кобичев Владислав Валерійович
Кобичева Лариса Миколаївна
Мокіна Валентина Михайлівна
Пода Денис Валентинович
Поліщук Оксана Григорівна
Третяк Володимир Ілліч
Черняк Дмитро Миколайович

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2020-04-02